Sheave



M. E. NEENAN Dec. 25. 1-923.

SHEAVE Original Filed Aug. 1

v ATTORNEY in Sheaves, of

-Reissue d Dec. 25, 1923.

UNITED; STATES PATENT OFFICE.

MIOHA'EL E; NEENAN, or NEW Yonx, N. Y., lassrenon fro NEENAN ELEVATORCOR- PORATION, ncoaronarron on NEW YORK. C

- SHEAVE.

Original in. 1,4 42,899, dated a citizen of the UnitedStates, and aresident of the city of New York, in the county of -New York and Stateof New York, have invented certain new and useful Improvementsspecification.

V The invention relates to improvements in sheavesapplicable toielevatorutilities, having associated therewith a radially disposed fiberperipheral traction tread arranged to receive ropes and cables of anymaterial which latter forms their own grooves on frictional engagingsurfaces Oneobject'of the invention is the provid ing of a peripheraltraction tread for sheaves or like articles of manufacture, made up of aplurality of twisted tarred fiber portions or other like materialradially disposed with relation to the axis of the sheave, and per.-Inanently pressed into position upon the reception drumof said'sheave bymeans of a locking'orclamping plate in order to insure. an.1ncreasedtract1ongripping and wear resisting surface.

Another object of the invention resides in the fact, that by providing atraction tread of the type as set forth, that cables and other likeunits of sustenance, wear or cut their own grooves or channels therein,-

and by reason of the difference in material,

retard wear and injury to the engagingfaoes of the units, and further a.traction tread that when worn out, and requiring readjustment,suc'hparts may be discarded and an entire new tread supplied at very littlecost and trouble.

In the following is described in connection with the accompanyingdrawings, one embodiment of the invention, the features thereof beingmore practically pointed out hereinafter in the claims.

In the drawings, 1 is an end view of a sheave part thereof being shownin vertical sectional view illustrating the invention after the grooveshave been cut thereinby reason of the engagement therewith of cables,ropes, etc.; Fig. 2 is a detail vertical sectional view of the sheaveand fiber frictional treadillustrating the disposition of the units ofmaterialcomprised in said tread and Fig. 3 'i an elevation of a sheavepart of its edge being broken away to show the, pe-

January 23, 1923. Serial No. 492,896, filed August 17, 1921. reissuefiled May 28, 19 23. Serial No. 642,125.

which the following is a- Application for ripheral tread of fibrousmaterial applied thereto.

Similar numerals of reference indicate I similar parts throughout theseveral views. In the drawings 1 designatesfthe body of a sheavecomprising a sleeve Zoom 2 having formed therein an aperture 3 arrangedtoreceive a shaft and a series of spoke 4 carrying at their outer ends afemale drum 5 provided at its edge with a channeled shoulder 6.- Theinner wall of shoulder 6 1s tapered inwardly at 7 toform a receptionhousing for the peripheral fiber tread.

8 indicates a locking plate provided with a channeled shoulder 9 and atapering wall 10 to form the outer side of the sheave channel 11.

' 12 designates a multiplicity of fiber ro'e' .ends, set on theirrespective ends on t e housing formed by the female drum 5 andthetapered innerwalls 7 and 10 pf the cable housing or channel 11', andwhen said fiber ends are properly disposed thereon, a series of boltsl3are inserted in holes, 14 and nuts -15 placed thereon, and the plate 8is forced inwardly to a proper tension, the compression created byseating said locking plate 8 causes the fibrous fillers to become acompact hardened tractional tread, with a flush -wear -resisting surface16. Said surface 16 within channel 11 is depressed between therespective shoulders of the sheave, thereby providing guides for theunits in operative connection therewith. The action on said tread bycables, ropes or sheave actuating units, form in said peripheral treadgrooves 17 in which said units run untilthe fibrous filler is worn outor destroyed, at which time an entire new tread may be inserted with aminimum of time and expense.

The twisted tarred fiber rope ends disposed on the body of the sheave asabove described, constitute in effect a tread portion for the sheave,composed solely of a mass of separate individual fibers extendinglengthwise of each other side by side, which tread portion presents aflush, wear resistant, tractive surface composed solely of the outerends of the fibers. The tar of the rope ends forms a viscous binderwhich permeates the -mass of fibers, so that when the fiber mass isclamped between the shoulder and the locking plate of the receptionhousing, it will become compacted into a hardened tractional tread bodyof such character that the cables or ropes in their action on the flushwearresistant surface, will form the peripheral tread grooves 17 beforealluded to, whereby the ropes or cables willbe grip..

comprising a sheave supporting body, a re-- cept'ion drum [formedthereon, a series of twisted tarred rope ends set radially to the axisof said drum adapted to form a peripheral traction tread therefor, and alocking plate mounted on said drum and engag- ,ing said traction treadarranged to hold said tread in position thereon.

2. A device of the character described including a peripheral ,tractiontread' for sheaves, compnsing a plurality of twisted tarred rope endsdisposed radially with relation. to "the axis of said sheave, areception drum formed on said she-ave adapt-' ed to receive said tread,and a locking plate mounted on said drum and engaging said tread adaptedto compress said tread into substantially a solid fibrous mass intowhich a plurality of cables may form a plurality of grooves. v v v 3. Asheave provided with a tread portion composed solely of separateindividual fibers extending lengthwise of each other side by sidesubstantially radially of the sheave A and confined on the periphery ofthe sheave as a unitary body, and presenting a flush, wear resistant,tractive surface, .composed solely of the outer ends of the fibers.

the sheave, with their 4. A sheave provided with a tread portion"composed solely of amass of separatein dividual fibers extendinglengthwise of each other side by side radially of the sheave, the saidmass of fibers being confined on the sheave as a unitary body, andpresenting a flush, wear resistant, tractive surf-ace, composed solelyofthe outer ends of the fibers.

5. A sheave consisting of abody portion having a peripheral supportingsurface and provided with 'a' tread portion composed solely .of a massof individual separate fibers extending lengthwise 'of each other sideby side radially of the sheave with their inner ends seated on saidsupporting surface, and their outer ends presenting a flush, wearresistant, tractive surface com posed solely of the outer ends of thefibers.

6.. A sheave provided with a tread'portion composed solely of anaggregationof separate individual fibers extendin lengthwise of' eachother'sideby sidera iallyof the sheave and compacted into a hardenedmass presenting a flush, wear resistant, tractive surface composedsolely of the outer ends of the fibers. j 7. A sheave provided with atread portion composed of a mass of separate individual fibers andapermeating viscousbinder, the

said fibers extending lengthwise of each other side by side radially ofthe sheave and confined fixedly on the periphery of the sheave as aunitary body, and presenting a flush, wear resistant, tractive' surface,com posed solely of the outer ends of the fibers.

8; A sheave provided-.with a peripheral tractive portion composed of amass of fibers madeup of a series of bundles of individual fibersextending substantially radially of I outer ends presenting a tractivesurface.

- MICHAEL-E. NEENAN.

